Saturday, January 12, 2013

Early Morning Window Frost

Frost forms on windows when cold air outside cools down warm, moist indoor air.  The patterns are the caused by dirt, grease, imperfections, or other residues on the glass.  If you have a clean window, there will be less patterning.  Hurray for dirty windows!

We have an old house with some old windows.  Because they are less efficient, there's more "contact" with the outside air, and more likely to form frost than newer windows.

I like this Guide to Frost at